23/1999

Pilous Z.: Mech Orthotrichum urnigerum Myr. v České a Slovenské republice, 2–2The moss Orthotrichum urnigerum Myr. in the Czech and Slovak RepublicsAbstract: Many species of the genus Orthotrichum are rare/threatened species of moss flora of the Czech and Slovak Republics. Author discusses changing distribution of Orthotrichum urnigerum Myr. during last decades.

Pilous Z.: Catoscopium nigritum (Hedw.) Brid. na Slovensku, 3–4Catoscopium nigritum (Hedw.) Brid. in SlovakiaAbstract: Catoscopium nigritum (Hedw.) Brid. is subarctic(-subalpine) species (cf. Düll 1985) and its distribution reaches mountains of Central Europe. This species regarded as rare (Kubinská et Janovicová 1996) in the Slovak Republic has relatively lots of localities in mountains of Slovakia. As well as in other countries, in Slovakia it grows sometimes at lowland localities, where is probably as a glacial relict.

Liška J., Palice Z. & Bayerová Š.: Cladonia luteoalba a C. norvegica – nové dutohlávky pro ČR, 4–7Cladonia luteoalba and C. norvegica, new lichens for the Czech RepublicAbstract: Cladonia luteoalba Wils. et Wheld. and C. norvegica Tonsberg et Holien are reported for the first time from the Czech Republic. Chemical analysis (TLC) confirmed usnic and squamatic acid (C. luteoalba) and barbatic acid (C. norvegica). Both species seemed to be rather rare in Central Europe till now but might be only overlooked.